Lasing oscillation in a three-dimensional photonic crystal nanocavity with a complete bandgap

TL;DR

This paper reports the achievement of lasing oscillation in a three-dimensional photonic crystal nanocavity with a complete bandgap, demonstrating control over laser properties through crystal size adjustments, advancing photonic device integration.

Contribution

It introduces a novel three-dimensional photonic crystal nanocavity laser with high quality factor and controllable characteristics, enabling new applications in integrated photonics and quantum electrodynamics.

Findings

Achieved lasing in a 3D photonic crystal nanocavity.

Demonstrated control of laser threshold and emission via crystal size.

Showed high-quality factor of ~38,500 in the cavity.

Abstract

We demonstrate lasing oscillation in a three-dimensional photonic crystal nanocavity. The laser is realized by coupling a cavity mode, which is localized in a complete photonic bandgap and exhibits the highest quality factor of ~38,500, with high-quality semiconductor quantum dots. We show a systematic change in the laser characteristics, including the threshold and the spontaneous emission coupling factor by controlling the crystal size, which consequently changes the strength of photon confinement in the third dimension. This opens up many interesting possibilities for realizing future ultimate light sources and three-dimensional integrated photonic circuits and for more fundamental studies of physics in the field of cavity quantum electrodynamics.